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Hello! Dan Busa with Dish Netywork here intermittent signal loss like that is usually caused by some sort of glitch a hard reset ( unplugging it for ten seconds ) will usually resolve this. If your signal strength is at or above 80 that should be fine, but keep in mind you need good signal strength on both the 119 and 110 satellites ideally you should be at 70 .

Holding the satellite signal strength indicator icon (upper left hand corner of screen) for a few seconds with your finger brings up a visual display showing signal strength of various satellites, accuracy, speed and elevation.

From a cold start - I too have experienced 2 to 3 minute wait times for satellite aquisition, so I would presume this is a normal. I own three different Garmin units apart from the 765T and satellite aquisition times vary on all three, most aquire satellites in under 4 minutes. Traffic on the other hand seems to take a while to load as this is dependent on availability in your area.

if it shows 9-11 satellites, it has aquired them. let it sit for a bit until it gets the proper data for them. if it has just been turned on for the first time or is left off a lot it may take 3-5 mins to figure out its locations.

When you change geographical locations with any GPS it will take a lot longer for the GPS to acquire the sattelites. Hold the GPS out in an unobstructed area and switch it on. Be patient it will acqurie the signals if it was working before you left home.

Does it pick up any at all? you need 3 to get a fixed posistion. If you see one or two picking up then it may be your location. Also try doing a firmware update, I have seen that fix this problem on other units.

I have a 276C that has the same problem. Garmin has a unit with this
problem and is working on a solution. The problem is that the real time
clock loses time when the unit is turned off and disconnected from a
power source. As a result when you turn on the unit it thinks the
satelites are in a different orbit than where they actually are. The
unit will continue trying to aquire forever and not find the satelites.
You have to select "New Location" from the menu and select "Autolocate"
and the unit will start to look for any satelites in view. The unit
should get a fix within 15 minutes. This is a very frustrating problem
having to reset it every day. There is a new version of firmware (5.3).
I don't know if the problem has been fixed with this release.